 fuel supply to carbs, any comments ? |
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| Triaddave |
 May 25 2005, 10:23 AM
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#1
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Member  Group: Members Posts: 244 Joined: 31-December 03 From: olympia,wa Member No.: 1,478  |
i,m in the final stages of the engine rebuild and currently hooking up the fuel supply to the carbs. the way i had it set up on the 40 idf was from pressure regulator to first carb then from carb # 1 to carb # 2. some folks say that i should come off the regulator to a "tee" and supply both carbs equally...the new carbs are the 44 idf... does it make a difference one way or the other ?
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| Triaddave |
May 25 2005, 10:29 AM
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#2
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Member Group: Members Posts: 244 Joined: 31-December 03 From: olympia,wa Member No.: 1,478 |
another thing, i want to do something with the extra fuel line, the return line. some say to keep it intact to be used as a back up line, some say to cap it off at the tank. i want to keep the clutter out of the engine bay so i need to hide it or get rid of it altogether...
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| URY914 |
May 25 2005, 10:30 AM
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#3
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,737 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
Simple answer...
Tee off to the carbs after the pressure regulator. Paul |
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| Triaddave |
May 25 2005, 10:39 AM
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#4
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Member Group: Members Posts: 244 Joined: 31-December 03 From: olympia,wa Member No.: 1,478 |
so you are saying that carb #1 could starve carb # 2?
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| SLITS |
May 25 2005, 10:41 AM
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#5
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
I would use the Mallory fuel pressure regulator w/return to the tank. Fresh cold fuel to the carbs.
Other than that, pressure reg..."T"......lines to each carb. |
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| Joe Ricard |
May 25 2005, 10:41 AM
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#6
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CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
cap off the smaller fuel line at the tank. Snip it off or pull it out. Chances are in a year it will have so much crap in it you DON'T want to run gas in it anyway. or be so dry rotten it won't hold gas.
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| URY914 |
May 25 2005, 10:42 AM
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#7
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I built the lightest 914 in the history of mankind. Group: Members Posts: 120,737 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
Yes,
also install a pressure gauge after the regulater, before the tee. Paul |
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| scooter311 |
May 25 2005, 10:51 AM
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#8
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Member Group: Members Posts: 231 Joined: 22-October 04 From: Upstate NY Member No.: 2,986 |
On mine - Holley regulator with 2 outlets, one to each carb, pressure gauge on fitting next to regulator.
Looks cool with braided stainless lines too, wooooo |
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| Triaddave |
May 25 2005, 10:52 AM
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#9
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Member Group: Members Posts: 244 Joined: 31-December 03 From: olympia,wa Member No.: 1,478 |
the fuel pressure gauge is in hand and will be installed after the regulator....what kind of pressure will i be looking at?...
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| morph |
May 25 2005, 11:11 AM
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#10
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quality parts builder Group: Members Posts: 1,828 Joined: 25-November 03 From: oregon coast Member No.: 1,389 Region Association: Pacific Northwest |
what i did was use a rotery pump that i didnt have to put a regulator on.with webers volume is key if you ever drive it hard.IMHO also less items to put in line it looks cleaner.i run 4.5 psi to my IDFs
james |
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| machina |
May 25 2005, 11:17 AM
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#11
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Advanced Member Group: Benefactors Posts: 2,030 Joined: 21-June 03 From: Miami Beach, FL Member No.: 848 |
(IMG:http://www.914world.com/bbs2/html/emoticons/agree.gif) That's what I did, Mallory reg feeds in the bottom and out the sides to each carb and then the return out the front. Attached image(s) 
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| Aaron Cox |
May 25 2005, 11:18 AM
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#12
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
i ditched the return line.
i went P. Regulator ----- Tee ------one line to each carb (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) no more than 3.5psi to the carbs (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif) |
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| ArtechnikA |
May 25 2005, 11:21 AM
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#13
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
i'm going to need to do something like that -- do you have an identifying part number for the regulator ? thanks. |
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| machina |
May 25 2005, 11:33 AM
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#14
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Advanced Member Group: Benefactors Posts: 2,030 Joined: 21-June 03 From: Miami Beach, FL Member No.: 848 |
Try Century performance. They had alot of Mallory in stock when other places did not. http://www.centuryperformance.com/detail.a...CT_ID=MAL-4307M I also used their low pressure fuel pump. Draws 1/2 the amps of the holley I replaced and it is super quiet and billet alu instead of cheap pot metal. My holley cracked at the inlet. |
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| ArtechnikA |
May 25 2005, 12:06 PM
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#15
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rich herzog Group: Members Posts: 7,390 Joined: 4-April 03 From: Salted Roads, PA Member No.: 513 Region Association: None |
fascinating -- when i lived in Northern Nevada i'd never heard of them, and now that i'm gone... oh well - glad to hear of another supplier... i'm thinking of using the Pierburg roller-cell pump, but it's good to know of options. |
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